#ifndef BATT_MGMT_H
#define BATT_MGMT_H

#include <zephyr/types.h>
#include <stdbool.h>

#define BATT_MGMT_OVERSAMPLING_8X 8U
#define BATT_MGMT_OVERSAMPLING_16X 16U

typedef enum {
	BATT_STATE_DISCHARGING = 0,
	BATT_STATE_FULL,
	BATT_STATE_CHARGING,
	BATT_STATE_ERROR,
	BATT_STATE_UNKNOWN,
} batt_mgmt_state_t;

/**
 * @brief Measure battery VDDH voltage.
 *
 * @param oversampling Oversampling factor (BATT_MGMT_OVERSAMPLING_8X or BATT_MGMT_OVERSAMPLING_16X).
 * @param vddh_mv Pointer to store the result in millivolts.
 * @return 0 on success, negative errno on failure.
 */
int batt_mgmt_measure_vddh_mv(uint8_t oversampling, int32_t *vddh_mv);

/**
 * @brief Get raw charger status (GPIO level).
 *
 * Returns the current logic level of the charger status pin (typically from ETA6003).
 * This is the **raw GPIO status**, not a processed state machine result.
 *
 * @return true if charger pin is high (e.g., battery is "full"), false if low.
 */
bool batt_mgmt_get_charger_status(void);

/**
 * @brief Get processed battery state with blinking detection.
 *
 * Returns a derived state based on:
 * - USB VBUS presence (from usb_mgmt)
 * - Charger status GPIO level (from batt_mgmt_get_charger_status)
 * - Blinking detection (state changes within CONFIG_BATT_MGMT_CHG_BLINKING_WINDOW_MS)
 *
 * Note: This differs from batt_mgmt_get_charger_status() which returns the **raw** GPIO level.
 *
 * @return Battery state enum (DISCHARGING, FULL, CHARGING, or ERROR if blinking detected).
 */
batt_mgmt_state_t batt_mgmt_get_battery_state(void);

#endif